Find the least-squares regression line $\hat{y} = b_0 + b_1 x$ through the points $$(-3,1), (2,6), (4,15), (9,19), (12,25),$$ and then use it to find point estimates $\hat{y}$ corresponding to $x = 3$ and $x = 9$.

For $x = 3$, $\hat{y}$ =

For $x = 9$, $\hat{y}$ =